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Question : 3
Total: 30
The growing size of the human population is a cause of concern for all people. The rate of birth and death in a given population will determine its size. Reproduction is the process by which organisms increase their population. The process of sexual maturation for reproduction is gradual and takes place while general body growth is still going on. Some degree of sexual maturation does not necessarily mean that the mind or body is ready for sexual acts or for having and bringing up children. Various contraceptive devices are being used by human beings to control the size of population.
(a) List two common signs of sexual maturation in boys and girls.
(b) What is the result of reckless female foeticide?
(c) Which contraceptive method changes the hormonal balance of the body?
(d) Write two factors that determine the size of a population.
(a) List two common signs of sexual maturation in boys and girls.
(b) What is the result of reckless female foeticide?
(c) Which contraceptive method changes the hormonal balance of the body?
(d) Write two factors that determine the size of a population.
Solution:
(a) Common signs of sexual maturation in boys and girls are :
(i) Thick hair growing in new parts of the body such as armpits and the genital area between the thighs. Thinner hair can also appear on legs and arms, as well as on the face.
(ii) The skin frequently becomes oily and might begin to develop pimples.
(b) Due to reckless female foeticides, child sex ratio is declining at an alarming rate in some sections of the society.
(c) Contraceptive pills changes the hormonal balance of the body.
(d) Birth rate and Death rates are the factors which determines the size of the population.
(i) Thick hair growing in new parts of the body such as armpits and the genital area between the thighs. Thinner hair can also appear on legs and arms, as well as on the face.
(ii) The skin frequently becomes oily and might begin to develop pimples.
(b) Due to reckless female foeticides, child sex ratio is declining at an alarming rate in some sections of the society.
(c) Contraceptive pills changes the hormonal balance of the body.
(d) Birth rate and Death rates are the factors which determines the size of the population.
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